Anomalous Packing in Thin Nanoparticle Supercrystals
Anomalous Packing in Thin Nanoparticle Supercrystals
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DOI：
10.1103/physrevlett.82.5277
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发表时间：
1999-06
影响因子：
8.6
通讯作者：
D. Zanchet;M. S. Moreno;D. Ugarte
中科院分区：
文献类型：
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作者：
D. Zanchet;M. S. Moreno;D. Ugarte
我们报告了由几层和微米大小的金纳米粒子超晶体形成的结构研究，其中长程有序已被刺激的软热退火。我们已经清楚地确定了一个扩展的第一层躺在无定形碳基板和一个有序的第二层坐在双重鞍点。第三纳米颗粒层恢复了传统的紧密堆积堆叠。这种反常的包装已解释了一个简单的理论模型的基础上的色散力。
We report a structural study of gold nanoparticle supercrystals formed by a few layers and of micrometer size, where the long-range order has been stimulated by a soft thermal annealing. We have clearly identified an expansion of the first layer lying on amorphous carbon substrate and an ordered second layer sitting on twofold saddle points. The third nanoparticle layer recovers the conventional close-packed stacking. This anomalous packing has been explained by means of a simple theoretical model based on dispersional forces.